package com.zkingsoft.actions.tools.upload;



import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Random;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.json.simple.JSONObject;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.zkingsoft.actions.common.BaseController;
import com.zkingsoft.constance.SystemConstance;
import com.zkingsoft.pojo.AjaxResult;

/**
 * @description 文件上传action
 * @author 罗凯
 * @date 2016-11-01
 */
@Controller
@RequestMapping(value = "upload")
public class UploadFileController extends BaseController {
	
	
	//文件保存目录路径
	@Value("${file_storage_path}")
	String fileStoragePath;
	
	@Value("${nginx_url}")
	String nginxUrl;
	
	@RequestMapping(value = "/upload")
	public  @ResponseBody AjaxResult upLoadFile(HttpServletResponse response,HttpServletRequest request) throws IOException, FileUploadException{
		
	
		//源文件上传，检测大小和检测格式
		
		//返回保存路径，访问路径
		
		//压缩
		

		System.out.println("savePath---------"+fileStoragePath);
		System.out.println("saveUrl---------"+nginxUrl);
		//定义允许上传的文件扩展名
		HashMap<String, String> extMap = new HashMap<String, String>();
		extMap.put("image", "gif,jpg,jpeg,png,bmp");
		extMap.put("flash", "swf,flv");
		extMap.put("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
		extMap.put("file", "doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2");

		//最大文件大小
		long maxSize =1024* 1024*5;

		response.setContentType("text/html; charset=UTF-8");
		PrintWriter out=response.getWriter();
		
		if(!ServletFileUpload.isMultipartContent(request)){
			out.println(getError("请选择文件。"));
			return null;
		}
		//检查目录
		File uploadDir = new File(fileStoragePath);
		if(!uploadDir.isDirectory()){
			uploadDir.mkdir();
			out.println(getError("上传目录不存创建一个公司目录。"));
		}
		//检查目录写权限
		if(!uploadDir.canWrite()){
			out.println(getError("上传目录没有写权限。"));
			return null;
		}

		String dirName = request.getParameter("dir");

		String flag = request.getParameter("flag");
		String hiddenImg = request.getParameter("hiddenImg");
		//回调函数
		String callBack=request.getParameter("callBack");
		if(callBack!=null){
			callBack=callBack+"();";
		}

		if (dirName == null) {
			dirName = "image";
		}
		if(!extMap.containsKey(dirName)){
			out.println(getError("目录名不正确。"));
			return null;
		}
		//创建文件夹
			fileStoragePath += dirName + "/";
			nginxUrl += dirName + "/";
			File saveDirFile = new File(fileStoragePath);
			if (!saveDirFile.exists()) {
				saveDirFile.mkdirs();
			}
			SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
			String ymd = sdf.format(new Date());
			fileStoragePath += ymd + "/";
			nginxUrl += ymd + "/";
			File dirFile = new File(fileStoragePath);
			if (!dirFile.exists()) {
				dirFile.mkdirs();
			}

			FileItemFactory factory = new DiskFileItemFactory();
			ServletFileUpload upload = new ServletFileUpload(factory);
			upload.setHeaderEncoding("UTF-8");
			List items = upload.parseRequest(request);
			Iterator itr = items.iterator();
		while (itr.hasNext()) {
			FileItem item = (FileItem) itr.next();
			String fileName = item.getName();
			long fileSize = item.getSize();
			if (!item.isFormField()) {
				//检查文件大小
				if(item.getSize() > maxSize){
					out.println(getError("上传文件大小超过限制。"));
					return null;
				}
				//检查扩展名
				String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
				if(!Arrays.<String>asList(extMap.get(dirName).split(",")).contains(fileExt)){
					out.println(getError("上传文件扩展名是不允许的扩展名。\n只允许" + extMap.get(dirName) + "格式。"));
					return null;
				}

				SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
				String newFileName = df.format(new Date()) + "_" + new Random().nextInt(1000) + "." + fileExt;
				try{
					//System.out.println(savePath);
					File uploadedFile = new File(fileStoragePath, newFileName);
					item.write(uploadedFile);
				}catch(Exception e){
					out.println(getError("上传文件失败。"));
					return null;
				}

				String visitPath = nginxUrl + newFileName;
				System.out.println("上传一个文件："+newFileName);
				
				out.print(
						"<script type='text/javascript'>"+
						"		window.parent.document.getElementById('"+flag+"').setAttribute('src', '"+visitPath+"');"+
						"		window.parent.document.getElementById('"+hiddenImg+"').value='"+visitPath+"';"+callBack+
						"</script>");
			}
		}
		
		return null;
	}
	/**
	 * 返回错误信息
	 * @param message
	 * @return
	 */
	private String getError(String message) {
		JSONObject obj = new JSONObject();
		obj.put("error", 1);
		obj.put("message", message);
		return obj.toJSONString();
	}
}